Final answer:
A person cannot be WF and WM at the same time, but can be WD and WF or WN and WF at the same time.
Step-by-step explanation:
A person cannot be WF and WM at the same time. The letter W represents a specific attribute or characteristic, while the letters F, M, and N represent different categories. A person cannot simultaneously possess contradictory attributes or characteristics. Therefore, a person can be WD and WF or WN and WF at the same time, but not a WF and WM.